• -25%

Monster Bloom Grotek – High-Performance PK 50-30 Flowering Booster

star star star star star

Monster Bloom by Grotek is a classic in the world of high-yield cultivation. This powdered additive with a powerful NPK 0-50-30 concentration is designed to trigger explosive flowering, increasing the size, density, and weight of your flowers. Ideal for the second half of the blooming stage, it ensures your harvest reaches its maximum genetic potential.
 

100 day satisfaction guarantee

 

Discreet delivery worldwide

 

Unlimited cash on delivery

Urgent delivery in 24/48 hours  Urgent delivery in 24/48 hours
Buy
41.25€ taxes included
PVP
55.00€
DTO
-25%
YOU SAVE
13.75€
Format
Quantity
  • Description
  • Data Sheet
  • Questions
  • Reviews
  • Delivery and Payment
Play Play Text to Audio Speaker

Monster Bloom by Grotek is the definitive tool for growers who aren't satisfied with average results and demand rock-hard, heavy flowers. This legendary powdered additive is specifically formulated to provide a massive injection of Phosphorus and Potassium right when your plants need it most to fatten up the crop.

Why are your buds not getting fat enough?

You've spent months pampering your grow, controlling the climate, and watering with care, yet when the final weeks arrive, the flowers look airy, small, and lack that professional density. Does it sound familiar? You are looking for that "rock" effect, but you only get "popcorn" buds.

There is nothing more frustrating than putting in all the effort for a mediocre harvest that barely moves the scale. Watching your plants stall in the fattening phase feels like wasting time and electricity, leaving you wondering what the secret is to those magazine-quality crops.

The solution is simpler than you think: Monster Bloom. By introducing this high-concentration PK booster, you force the plant to focus all its energy on flower production and resin synthesis, turning those airy flowers into heavy, compact buds that will surprise you.

Turn your harvest into a heavyweight champion

Using Monster Bloom in your feeding chart changes the rules of the game. Its main function is to maximize photosynthesis and starch production within the plant tissue. This translates directly into volume and weight.

It's not just about quantity; quality improves drastically. By providing the necessary levels of Phosphorus (50%) and Potassium (30%), you are giving the plant the raw material to create essential oils and terpenes. The result is a harvest that is not only heavier but also more aromatic and potent. It is the perfect complement to your base cannabis fertilizers.

How to use Monster Bloom for explosive results

This product is extremely concentrated, so "less is more." Using it correctly is key to avoiding over-fertilization and getting the most out of every gram of powder.

  1. Preparation: Dissolve the powder well in your irrigation water. The standard dose is 0.3 grams per liter of water (approx. 3 grams per 10 liters).
  2. Timing: Start using it from the 4th or 5th week of flowering (when the buds are already formed and starting to fatten).
  3. Frequency: Apply it once a week.
  4. Control: Since it is a mineral salt, it is vital to measure the EC and pH. Use reliable PH meters to ensure your plants can absorb these nutrients.
  5. The End: Stop using it 10 to 15 days before harvest to flush the roots properly.

Key advantages and benefits (FAB)

  • High concentration (PK 0-50-30): Provides a massive amount of macronutrients without Nitrogen, which forces the plant to stop growing green mass and focus solely on the flower.
  • Powder format: It is highly soluble and easy to store, meaning you get a product that lasts a long time and degrades less than liquids.
  • Stimulates secondary metabolism: Increases the production of terpenes and essential oils, resulting in a final product with better flavor and aroma.
  • Versatility: It works perfectly in soil, coco, and hydroponic systems.
  • Compatibility: You can use it alongside other additives, although it pairs exceptionally well with Heavy Bud Pro.

Care and storage recommendations

Because it is a powdered product, humidity is its worst enemy. Always keep the container tightly closed in a cool, dry place. If moisture gets in, it might cake up, making it harder to dose accurately.

Also, remember that Monster Bloom is powerful. If you see burnt tips on the leaves (nutrient burn), reduce the dose immediately. It is always better to start with a slightly lower dose and increase it as you see how your specific strain reacts.

Frequently Asked Questions

When should I start using Monster Bloom?

You should start when the buds are already formed and the "fattening" phase begins, usually around week 4 or 5 of flowering, depending on the strain.

Can I mix it with other fertilizers?

Yes, it is compatible with most base fertilizers. However, be careful if you use other PK boosters at the same time to avoid raising the EC too much.

Is it suitable for hydroponics?

Absolutely. Being a highly soluble mineral fertilizer, it does not clog drippers or ducts, making it ideal for hydro and aero systems.

Does it affect the flavor of the weed?

If used correctly and flushed properly before harvesting and drying marijuana, it actually enhances the flavor by increasing resin production. If you don't flush, it might leave a metallic taste, so don't skip the final cleaning!

Personal Experience of Pevgrow’s CEO (Alan)

I've seen many trends come and go in this industry, but Grotek's Monster Bloom remains a fixture on my shelf for a reason: it works. I remember the first time I used it on a Critical crop; the difference in the hardness of the buds compared to the previous cycle was abysmal. It's like giving your plants a gym membership for the last month.

My personal trick is to be very careful with the dosage. Many people think that adding more powder will give bigger buds, but with Monster Bloom, the 0.3g/L limit is real. If you respect that and combine it with a good root flush at the end, the result is professional-grade weed: hard, heavy, and full of resin. It's a small investment for the weight you gain.

Cultivation phase: Cultivation phase Flowering
Properties: Properties Root washing
Type of crop: Type of crop Hydroponics
Soil
Composition: Composition Mineral
Brands: Brands Grotek

Customer questions Monster Bloom Grotek – High-Performance PK 50-30 Flowering Booster

Grade 
star star star star star_border
Kevin
09/26/2018

Can I smoke if it has been only 1 week of rinse.my plant got blown down in a storm

Answer:
Bonjour Kevin! I would leave it one more week to do a more complete root wash, since this fertilizer is not organic. Cordialement
Grade 
star star star star star
ami
08/10/2018

Do I use mosterbloom in Addition to the other nutrients I am givving, or Instead of them??
Indoor,soil,week 7 of flowering stage, mostly Sativas. Hermies,with seeds.
Thank you
Ami

Answer:
Hi Ami! A product that is perfectly compatible with Heavy Bud by Grotek, to enhance the final results in your crop. What other additives are you using? Regards
Grade 
star star star star star
Grant
08/08/2018

Hello, is this considered an organic product and do you think it would harm any beneficial microbe's in and organic soil mix? Like destany sooo gir example.

Answer:
Bonjour Grand! This non-organic fertilizer is mineral. Thanks and regards

star star star star star

Comments|Questions Monster Bloom Grotek – High-Performance PK 50-30 Flowering Booster: 12 - Average Rating: 5/5

Customer reviews Monster Bloom Grotek – High-Performance PK 50-30 Flowering Booster

Grade 
star star star star star
John Marsom - Verified buyer
02/17/2024 Martos, Spain

Works very well, you can see the difference with or without the fertilizer.

Grade 
star star star star star
Denise Turner Turner - Verified buyer
10/13/2021 Oh, United States
monster bloom

I have been using it for years and I won't change it, it's a very good product.

Grade 
star star star star star
jose - Verified buyer
07/16/2021 Pontevedra, España
monster bloom

cuanta veces se usa 1 vez a ls semana o todos los dias

Answer:
hola jose ,una vez por semana , saludos
Grade 
star star star star star
Matthew Belton - Verified buyer
12/28/2020 Ponferrada, Spain

Very good flowering booster.

Grade 
star star star star star
Vincenzo Castrogiovanni - Verified buyer
12/10/2020 Barcelona, Spain
Excellent!

Flower booster, of very good quality, with remarkable results. Essential supplement during flowering! For me, the best!

Grade 
star star star star star
Nomar Hernandez - Verified buyer
05/04/2020 Sparks, United States

Very good boost to use with caution on the dosage because in powder form, a small scale should be prepared to mix it, but results are visible quickly.

Grade 
star star star star star
Catherine Mccarthy - Verified buyer
04/27/2020 Co. Down, United Kingdom
compatibility

I already have the gh flora-series product line... is it safe to use?

Answer:
Hello, yes, it is safe if you follow the manufacturer's instructions.
Grade 
star star star star star
Dar K - Verified buyer
10/09/2019 Berlin, Germany

The product is amazing it?s help me so so much

Grade 
star star star star star_border
Georg Saros - Verified buyer
03/05/2019 Tyresp, Sweden

The plant notices it shortly after starting to apply it, very recommendable quality-price.

  • Is the shipping discreet?

    Yes, the shipment is 100% discreet, no one will know what you have bought, also the sender is SITE OF SHOPS ONLINE.

  • Do you ship worldwide?

    Yes, we ship to almost every country in the world although you need to know the current legislation in your country to make sure that you do not break any regulations with the germination of the seeds.

    UK: 3-4 days (express)
    USA: 4-5 days (express)
    Australia: 4-5 days (express)
    Japan: 4-5 days (express)
    Canada: 4-5 days (express)
    South Africa: 4-5 days (express)
    New Zealand: 5-7 days (express)
    View all

    The customer must be informed about the laws of their country regarding seeds or other products that may be purchased on our website, the possession of which may constitute a criminal offence in the country of receipt.

    We cannot be made responsible for the wrong use that some people decide to give to the seeds, so please don't act against your national laws.

    Due to problems with customs you can check here for restrictions to certain countries.

  • What payment methods and currencies do you accept?

    We accept the following payment methods: Bank transfer, Cryptocurrencies, cash, credit and debit cards and cash on delivery (Spain, Belgium, France, Italy, Portugal).

    You can change the currency on the top right to know the price of the products in your local currency and of course pay this way.

  • How long does it take to ship my order?

    In 24/48 hours we will ship your order.

  • Are the seeds guaranteed to germinate?

    If you live in a country where the cultivation of cannabis is legal and you decide to plant the seeds, it is good that you know that all the seeds that we commercialize have germination guarantee.

    If you germinate with the method of paper napkins and you have followed all the steps that we indicate here, you will only have to return us the seeds not germinated in their original packaging and when we receive them we will proceed to the change.

    Then we take care of requesting the return to the seed bank, we do not transfer this responsibility and time to our customers.

  • What if I receive a bad or damaged product?

    If you receive a broken product due to transport, you have to notify us within 24 hours for insurance coverage, always contact us as soon as possible and we will fix the problem!

other products in the same category:
Customers who bought this product also bought:
Leave us your opinion or ask us any questions you have about this seed and participate in the raffle!

Among all those who comment or send us your questions, there will be a monthly raffle for a €50 voucher for your purchases at Pevgrow. What are you waiting for? Write us and participate!

Leave us your opinion or ask us any questions you have about this seed and participate in the raffle!
Write your comment or question for Monster Bloom Grotek – High-Performance PK 50-30 Flowering Booster
Have you tried it? Rate the product and leave your opinion.

Captcha
Only comments and doubts about the product please

We want to know your opinion and experiences about our products or help you with any doubts you may have about it. It helps us to improve and it can also help other customers to decide what to choose. That is why we have this great tool for commenting
Good luck commenting!


Aspects to consider

Why have you chosen this valuation?
What did you like about the product?
Would you recommend the product?
What did you think of the PevGrow service?